Nut-lock.



PATENTED MAR. 6, 1906.

J. H. BUTTERFIBLD.

NUT LOOK. APPLIOATION FILED JULYIO. 1905.

al'foznog UNITED STATES PATENT OFFICE.

JAMES H. BUTTERFIELD, OF LOGAN, O HIO.

NUT-LOCK.

Specification of Letters Patent.

Patented March 6, 1906.

Application filed July 10,1905. Serial No. 269,108.

\ clare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention relates to improvements in nut-locks; and it consists inthe novel con-' struction, combination, and arrangement of deviceshereinafter described and claimed.

The object of the invention is to provide a simple and comparativelyinexpensive device which may be readily employed upon bolts of any kindto effectively lock theirnuts against rotation.

The above and other objects are attained by means of the constructionillustrated in the accompanying drawings, in which Figure 1 is a sideelevation of, a nut and bolt with my improved locking washer or de viceapplied thereto. Fig. 2 is a longitudinal sectional view through thesame. Fig. 3 is a perspective view of the outer face of thelocking-washer. Fig. 4 is a similar view of the inner face of the same,and Fig. 5 is a detail view of the locking-wire.

Referring to the drawings by numeral, 1 denotes an object of anydescription through which the bolt 2 passes, and 3 denotes my improvedlocking device for securing the nut 4 upon the screw-threaded end 5 ofthe bolt. The locking device 3 consists of two parts-a washer 6 andlocking-wire 7. The washer 6, which is preferably, but not necessarily,in the form of a circular disk, has upon its inner side means forpreventing its rotation upon the object 1. Said means may be .of anydesired form, but, as illustrated in the drawings, consists of one ormore lugs or projections 8, which are adapted to enter the recesses 9,formed in the object 1. In the outer face of the disk or washer 6 isformed a substantially spiral groove 10, in which the locking-wire 7 isseated. The depth of said groove is equal to the diameter of thelocking-wire 7, so that the latter does not project beyond the outerface of the washer, and said washer presents a flat surface forengagement by the flat inner surface of the nut. The main portion of thegroove 10 is substantially circular in form and of slightly less widthor diameter than the ends of said the length of the diagonal of the nut4, while grooves overlap each other and are of spiral shape, the innerend turning inwardly and the outer one outwardly, as

clearly shown in Fig. 3 of the drawings. The locking-wire 7 is adaptedto be seated in the groove 10 and may be retained therein by bending itsinner end 11 angularly and seating it in an opening 12, formed in thewasher. The length of the locking-wire 7 is greater than that of thegroove 10, so that its free end 13 projects beyond the edge of thewasher to permit it to be readily bent upwardly into engagement with oneside of the nut 4 after thelatter has been screwed upon the bolt inorder to lock the nut thereon. It will be seen that by making the groove10 of the size and shape illustrated and providing a flexible wire orsimilar element therein the latter may be bent upwardly at any point, soas to lock the nut in any position.

The construction, operation, and advantage of the invention will bereadily understood from the foregoing description, taken in connectionwith the accompanying drawmgs.

It will be seen that the devices may be used upon bolts and nuts of theordinary or any preferred construction and that they will effectivelylock the nuts in place wherever they mayhappen to stop. Owing to thesimplicity of the construction, they may be manufactured at acomparatively small cost and may be quickly and easily applied. Theywill also permit the nuts to be tightened from time to time, as will bereadily seen.

Various changes in the form, proportion, and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of this invention.

Having thus described my invention,what I claim as new, and desire tosecure by Letters Patent, is

The combination of a bolt and nut thereon, with a washer on the bolt anda locking-wire, said washer having projections on its inner side toengage the object against which it is placed, to prevent it fromturning, and being provided in its outer face with a spiral groove,terminating outwardly at the edge of the washer, and with an opening 12at the inner end of said groove, said wire having a spiral portionseated in said groove, its inner end bent and extended into the opening12 and its outer end bent at an angle and bearing my hand in presence oftwo subscri hingwit against one side of the nut, the depth of thenesses. said groove being equal to the diameter of the looking-Wire andthe said nut presenting a fiat JAMES BUTTERFIELD' 5 inner" surfaceengaged by the flat outer face Witnesses:

of the Washer, substantially as described. C. V. WRIGHT,

In testimony whereof I have hereunto set ELMER O. PETTIT.

